While attending the IBM Power Systems
Symposium this week, I learnt that starting with AIX 7.1 (and AIX 6.1 TL6) JFS2
logging is disabled during a mksysb restore. You may be familiar with disabling
JFS2 logs, if not, take a look at this IBM technical note:...

At the IBM Power Systems Technical University in October, there was a fascinating session on Disk IO Tuning in AIX 6.1. I didn't get to see the session, but the presentation slides are well worth reading. (URL to the slides updated, Jan 24,...